Mining apparatus



I I i I Oct. 11, 1927. a M. P. HOLMES 645 003 MINING APPARATUS OriginalFiled April '7. 1919 3 sheets-sheet;

I'ro marr Bil M. P. HQLMES Oct. 11, 1927;

I MINING APPARATUS 3 Sheets-Sheet 2 Original Filed April 7, 1919 1,645,0M. Pr HOLMES 03 MINING APPARATUS Original Filed AprJFl 7, IQJ Q 5Sheets-Sheet 3 Patented Get. 11, 1927.

UNITED STATES arias PATIENT tries.

Mortals P. notices, or otazanraonr, New i'zararsninn, assteuon 'roSULLIVAN CHINEBY COMPANY, A oonronarron on MASSACHUSETTS.

MINING APPARATUt5.

Application filed April 7, 1919, Serial No. 288,133; Renewed November a,less.

My invention relates to mining apparatus.

It has for its object to provide improved mining apparatus especiallyadapted to uLe in entry driving. A further object of my invention is toprovide an improved entry driving apparatus adapted to advance an entryrapidly and provided with improved cutting and feeding means adapted toproduce an entry of the desired width with a minimum of cutting. A stillfurther object of my invention is to provide an improved entry cuttingapparatus adapted to produce an improved entryhaving the desiredfiatbottom and arched roof, and also having provision for removing anyobstructions. such as sulphur, black jack, or the like. These and otherobjects and advantages of my improved construction will, however,hereinafter more fully appear.

In the accompanying drawings, I have shown for purposes of illustrationone en1- bodiment which my invention may assume in practice.

In these drawings,

Fig. 1 is a plan View, partially in section of a mining apparatusconstructed in accordance with my improvement, the same being shown inposition in an entry.

Fig. 2 is a side elevation of the same, showing the rear section in twopositions.

F 3 is a front elevation showing the out ting mechanism.

Fig. t is a transverse sectional view taken substantially on line H ofFig. 2, the con 5 veyor mechanism being omitted to facilitateillustration. a

Fig. 5 is a detailed sectional view taken on line 55 of Fig. 4e.

6 is a deta isectional View taken on line 6-6 of Fig. 41.

In this iliu'strative construct-ion, it will b observed that I haveshown an apparatus including a cutter carrying section 1 and ananchoring section 2, the same beingconnected by feed screws 3, ashereinafter described, so that they may be successively advanced as theentry is driven, the cuttings being removed and preferably delivered tocar by a conveyor t of any suitable construction iv he; ein extending toa point beneath the front end of the section 1 and rearward and upwardover tl e top of the section 2.

Of these sections, the cutter carrying section 1 herein also carries thecutter driving and f ed operating mechanism; Refers...

more particularly to Fig. 3', a substantially elliptical cutter carryingelement, herein a bar 5 supported substantially vertically and againstthe face across the front of the machine, the sameher-ein beingprovidedwith the usual rounded ends and with curved or arcuate upper surface 6and a straight or horizontal lower surface 7 Around this cutter bar andalong these surfaces moves a cutter chain 8 having cutter bits 9disposed in the usual relation thereon but projected forward in such amannerthat they will out only on the front side of the chain as thelatter is moved around the bar. Here it will also be noted that insuitable spaced ree lation on the chain, 1 have provided re'a'rwardlyextending scrapers 10 for a purpose hereinafter described. Thus, it willbe old served that when the cutter chain ,8is'rotated the cutter bits 9'thereof will operate upon the face as the machine is moved forward. thecutter chain cutting throughout its length. r I

Opcratively connected to the cutter bar, is improved means for movingthe same bodily relative to theface as the cutter chain is op erated.These means, as, shown, include, a pair of similarly disposedcranks 11rigidly connected, as by means of bolts 12, to flanges 13 on the frontendof longitudinally disposed shafts 1e, 15, journaled in the rigidskeleton and herein rectangular frame 16 of the section 1 and atopposite sides of the center line thereof. As shown, these cranks 11 aredriven bya motor 17 of any suitable type, herein a reversible electricmotor controlled by usual controlling means 17f and rigidlysupportedupon the frame 16 substantially centrally thereof and midway b'e-' tweencrank driving shafts 14, the, connections as hereinafter describedpreferably being such that thesame means serve to drive the cranl-Isandthe cutter chain and the latter preferably also serves as a connectingmedium driving one crank from the other; i I v Referring moreparticularly to Fig. fl, it will be observed that the motor armatureshaft 18 carries a pinion 19 meshing with, a larger gear, 20 journaledin a suitable bean. ing 21, which in turn meshes with a gear 22 ofsubstantially the sarne diameter freely rotatable on the shaft 14 at apointin front of front cross member of f i .a rear of the flange 113 40the frame and inwhich the shaft 39 is rois in turn rigidly connected, asby a key 23, to a pinion 24 disposed between thesame and the flange 13,which in turn meshes with a larger gear 25 keyed at 26 to an lnnerlongitudinally disposed stub shaft 27 jour- 'naled in a suitableremovable bearing 28 in the end of the left hand crank 11 and rigidlyconnected, asby bolts 29, to the cutter bar 5. The outer end of thisshaft 27 in turn carries a cutter chain driving sprocket 30, and throughthe cutter chain 8 drives an idler sprocket 31 located at the oppositeend of the cutter bar. As shown, this sprocket 31 is in turn fixed tothe front end of'a stub shaft 32corresponding to the shaft 27, andsimilarly journaled in a suitable removable bearing 33 fixed to thecutter bar and itself journaled in the right hand crank 11. Thus it willbe noted that rotation of the armature is transmitted to the cutterchain 8.

Operatively connected to this shaft 32and driven by the rotation thereofas the cutter chain is rotated, is my improved means for rotating thecranks. As shown, the shaft 32' has keyed to its rear end a pinion 34meshing with a gear 35 carried on the shaft 15 at a point between itsflange 13 and the front of the frame. This gear 35 in turn hasintegrally attached thereto, as by a key 36, a rearwardly disposedpinion 37, which in turn meshes with a gear 38 fixed on the front end ofa longitudinally disposed shaft 39 suitably journaled in bearings 40 inthe frame and carrying a bevel gear 41 on its rear end rotating in asuitable gear casing 42. This bevel gear 41 in turn meshes constantlywith a bevel gear 43 which is disposed between the gear 41 and acooperating gear 44 rigidl connected to a sleeve 45 jonrnaled at 46 ontatable, the direction of rotation of the sleeve'45'being controlled bya reversing clutch mechanism 47 operable by asuitable controlling member48 carried on the top of the frame. As shown, this sleeve 45 alsocarries a pinion49 thereon meshing with a gear 50 keyed at 51to theshaft 15 and 0pcrating to rotate that shaft and its connected crank 11,while power is transmitted, through the bevel gear 43 and a transverseshaft 52 connected thereto and journaled on the frame, to rotate theother shaft 14 and its connected crank 11. More particularly, it will beobserved that the opposite end of the shaft 52 carries a bevel gear 53meshing with a corresponding bevel gear 54 carried on therear end of theshaft 55, cor- 56 on the frame.

respondingly located with respect to the shaft 39 and journaled insuitable bearings This shaft 55, however, itself acts as the drivingmember, the same herein having a pinion 57 keyed thereto and -meshingwith a gear 58ckeyed at 59 to the shaft 14. Thus it will'be observedthat as sides. two arcuate rib and bottom engaging parts ter bar in thesubstantially elliptical path indicated by the cross section of theentry in Fig. 3.

Operatively connected to this crank operating mechanism are improvedmeans for operating the cutter bar in such a manner as to facilitate theremoval of obstructions encountered during cutting. These means, asshown, include reversing mechanism preferably automatic and adapted toenable the movement of the cranks to be reversed in such a manner as tooscillate the bar within a variable limited path and thereby enable itto cut away the coal adjacent the obstruction. Referring moreparticularly to Fig. 4, it will be observed that the shaft 15 isprovided with a plurality of cams 61 adjustable angularly andlongitudinally relative thereto and adapted to be clamped in ad justedposition by means of set screws 62. Normally, these cams are in theinoperative position shown in full lines in Fig. 4. How

ever, when it is desired to oscillate the bar,

the cams are adjusted into the dotted line position shown. in thatfigure, so that they may engage at the proper time with the end J of acontrolling member 63 operatively connected to the reversing clutch 47and there- .by operate that clutch to reverse the direc- .may beadjusted even when the mechanism is in operation, although preferablythe motor -17 is shut down during this adjustment.

In my improved construction, the sections 1 and 2 are adapted to besuccessively advanced along the entry as the latter is eX- tended. Asshown, the section 1 is pror ided with a pair of longitudinally spacedtransversely disposed skids 64 rigidly connected to the frame 16 at itsopposite ends and Herein the front skid is formed in disposed onopposite sides of the front end of the conveyor 4, while the rear skidis substantially semi-elliptical in section and provided with a Hatbottom resting on the entry bottom, and curved upwardly extending sides'engageable with the ribs of the entry. As shown, each of these skidsrcenforced transversely by'suitable angle irons 64 and the edges ofthese skids are preferably beveled. as shown at 65, to facilitatemovement. In this form of my invention, it will also be noted that therear or anchoring sec tion 2 is in the form of one of these skids as forinstance a hand wheel 68, and movable through a suitable aperture 69 inthe skid into engagement with the adjacent side wall or rib of theentry.

Operatively connected to the motor and actuated thereby, is the feedingmechanism, which herein operates to feed the sections 1 and 2 forwardalternately and at different speeds. is shown, this mechanism includes aplurality of screw shafts 3, rotatable at their front ends in nuts 70,71 carried by suitable bearings 72 on the rear cross member of the frame16, and at their rear ends rotatable in nuts 73 carried at the oppositeends of a transversely disposed and horizontal evener '74 pivotallyconnected to a for wardly disposed extension 75 on the front end of therear section 2. Each of these shafts has splined to its front end areciprocable clutch member 76 operable by a suitable clutch shipper 77,in turn controlled by a controlling lever 78 carried on the top of theframe, the member '76 having teeth on its opposite ends adapted toengage with cooperating clutch faces 79 and 80 formed on members 81 and82, of which the members 79 are fixed to the shafts 1 1 and 15, whilethe members 80 are freely rotatable on the screw shafts 3 and areconnected through chain and sprocket connections 83' with the extending"rear ends of the shafts '39 and 55'. Thus, it will be observed that byvarying the connection of the clutch member 76, the

screw shafts may be rotated in opposite directions at different speeds,the same be ing connected in their slow speed connection, i. e. with themembers 81, to feed the cutting mechanism forward during the cuttingoperation when the rear section 1 isjacked securely in position,-a-nd,'after a predetermined forward feeding movement and the release ofthe jacks 67, then reversibly connected to the members 82, to feed therear section 2 rapidly toward the section 1, i. e. from the full lineposition shown in Fig. 2 to the dotted line position shown therein.

Operatively associated with the cutting and feeding mechanismhereinabove described, 1 preferably provideconveyor mechanism' adaptedto remove the cuttings from the cutting mechanism and convey the samerearwardly where they may be discharged into a car or the like. Thisconveyormechanism may, obviously, assume various forms. Herein, it willbe noted that the conveyor 4 is provided with an inlined middle sectionand oppositely extending end sections, one of which extends under theframe 16 to a point acent the cutting mechanism so that the conveyor mayact upon the cuttings on the front skid 64% and near the cuttingmechanism, while the other extends over the rear secticn 2 so that itmay deliver these cuttings into acar if desired. More particularly, itwill'be observed that the front end of the conveyor is suitablyattached, as at 84:, to the front skid 64, and that therear end of thesame is slidably supported in suitable upright flange supports 85 on therear skid 66', preferably at a point above the jacks 67, these supports85 herein being carried at a transverse" lower bracing member 86 hereinhaving formed thereon the lug 75*w'h-ich in turn carries the pivot 87for the evener or cros'shead 7e.

It will also be observed that the conveyor mechanism" is herein powerdriven by suit able means, herein by asepamte motor 88 carried on thesecond skid 64 and operatively connected to the conveyor through aflexible power connection 89. Here. menses is also directed to the factthat the mechanism on the section 1 is also preferably enclosed, as byplates 90, and that the controlling members for the several controllingniee-hani'snrs are operable from the operators station at the side ofthe frame. It will also be noted that the crank driving mechanismdisposed in front of the frame is enclosed in suitable gear covers 91.

In the operation of my improved co-nst-r tion, it will be noted that asthe cutter ch 8 is operated, the cutter bar 5 is moved bodily inopposite directions transversely and vertically through a substantiallyelliptical Lil path by the cr'an'lrs 11 and at a speed mate rially lessthan the speed of movement of the cutter cha'in relative to the bar andat the same time that the bar is moved bodil'y for: ward by the feedingmech'z-tnism. As a restrlt, it will be observed that the cutter chain isenabled to' cut progressively tl'iroii'gh'out its length over the entiresurface of the en try face, the face being cut su sta ntially as shownin 1 and 2'. Moreover, it will be noted that an entry of the sameeenfigura tion as the bar bu-tlarger and of the cross section shown inFig. 3 is thus produced which has the desired strong arched roof, thedesired width, and also the desired flat bottom, the entire out beingmade in the one operation by the one machine. Obviously,

as soon as thesection 1 has moved a predetermined distance forwardrelative to the section 2, by operating the clutch member 76, the slowforward cutting feed of the section 1 may be interrupted and the section2 fed forward by throwing the members 76' into engagement with themembers 82 as soon as the jacks 67 have been released. When the section2 has thus been brought into the deired position, the clutch maybe-disconnected and the jacks 67 again adjusted, whereupon the clutchmay be reconnected with the members 81 in such a manner as to'continu-ethe cutting feed movement of the section 1, this operationbeing repeated as the entry is extended. It will also be observed thatshould an obstruction be encountered in the face,

such asa sulphur ball or the like, the operator is enabled by adjustingthe cams ($1 to oscillate the cranks 11 at the same time that the cutterchain is operated and the machine is fed forward, in such a manner as tocause the bar to have a limited oscillatory movement of any desiredlength at the side or sides of the obstacle and thereby facilitate theremoval of the same. r I In the-use of my improved construction, it

will be evident that by varying the shape of the cutter bar the crosssection of the entry may be varied within wide limits. It will also beobservedthat the thrust resulting fromengagement of the bits with theface is efiectually utilized to assist in the movement of thecranks, thelatter being rotated in an opposite direction to the chain, as indicatedin Fig. 3, andthereby materially reducing the'power required to operatethe mechanism. Attention isalso directed to the fact that through theprovision of the scrapers 10 on the cutter chain the cuttings are forcedback from the same and toward the mouth of the conveyor 4 so that thecuttings do not interfere with the operation of the cutter chain and maybe readily removed by the conveyor. Due to the provision of my improvedoperative connections for the sections including the evener connectedfeed screw nuts, it will also be observed that the machine may bedirected angularly to change the direc tion of the entry when desired,the feed screws then being adapted to be operated independently in sucha manner as to vary the direction of the sections as necessary. Theseinvention may be modified and embodied in var ous other forms withoutdeparting from its spirit or the scope of the appended claims. To avoidpossibility of misunderstanding, it is to be understood that allusionsto the face in the accompanying claims are ;5

to the working face, that is to say, the face upon whichthe cuttingoperations of the machine are performed. it

- What I claim as new and desire to secure by Letters Patent is: V

1. In a mining-apparatus, a cutter carrying element disposedsubstantially parallel to the face, a cutter chain movable thereon, andmeans for moving said element through a substantially oblong path. I

2. In a mining apparatus, a'cutter,carry ing element disposedsubstantially parallel to the face, a cutter chain movable around theperiphery thereof, and means for moving said element through asubstantially oblong path.

In a mining apparatus, a cutter Carry ing element, a cutter chainmovable thereon, and means operatively connected to the ends of saidelement for moving the same through a substantially oblong path.

a. In a mining apparatus, a single laterally elongated cutter carryingelement disposed. substantially parallel to a plane face, and meansoperatively connected to the ends thereof for moving the sametransversely in its plane.

5. In a mining apparatus, a single laterally elongated cutter carryingelement disposed substantially parallel to a plane upright face,andmeans including cranks operativ-ely connected to theends thereof formoving the same transversely in its plane.

6. In a miningapparatus, a cutter carrying element, a cutter chainmovablethereon, and means for moving said element through asubstantially elliptical path.

7. In a mining apparatus, a cutter carrying element, a cutter chainmovable thereon, and means operatively connected to the ends of saidelement for moving the same through a substantially; elliptical path. I

8. In a mining apparatus, a cutter carrying element, a cutter chainmovable thereon, and rotating mechanism operatively connected to theends of said element for moving the same through a substantiallyelliptical ath.

. 9. n a mining apparatus, a substantially elliptical cuttersupportingelement disposed flatwise against the face, and cutting meansincluding a cutter chain on the surface thereof adjacent the face.

10'. In a mining apparatus, asubstantially elliptical cutter supportingelement disposed flatwise against the face, and cutting means includinga cutter chain disposed about the periphery of the surface thereofadjacent the face.

' 11. In a mining apparatus, a substantially ellipticalcutter'supporting element disposed flatwise against a parallel face, andcutting means'movable about the periphery of the surface adjacent theface.

12. In a mining apparatus, a substantially elliptical cutter supportingelement disposed 'flatwise against the face, and means for moving saidelement transversely of the face during cutting.

13. In'amining apparatus, a substantially elliptical cutter supportingelement disposed flatwis-e against the face, a' cutter chain movable onsaid element and means for moving said element longitudinally andtransversely of the face during cutting.

14:. In a mining apparatus, a cutter supporting element having a curvedupper surface and an oppositely disposed flat bottom surface, andcutting means movable along said surfaces and on the same side of saidelement.

15. In a mining apparatus, a cutter sup porting element having anarcuate edge and an oppositely disposed straightedge, a cutter chainmovable on said element, and means for operatively presenting saidelement flat- Wise to a face.

16. In a mining apparatus, a cutter supporting element disposedflat-wise against the face, a cutter chain movable on said element, andmeans for moving said element relative to the face to cut a largerentry.

17. In a mining apparatus, a cutter supsubstantially parallel to theWorking face,

a cutter chain movable relative thereto, and means for moving saidelement in a transversely disposed plane during cutting.

19. In a mining apparatus, a transversely disposed cutter supportingelement disposed substantially parallel to the Working face, a cutterchain movable relative thereto, and means for moving said element bothforward and in a transversely disposed plane during cutting.

20. In a mining apparatus, a cutter carrying element disposed parallelto the face, a movable cutter chain on the Working face thereof, andmeans for operating the same to cut an entry of substantially the sameconfiguration transversely as said cutter carrying element.

21. In a mining apparatus, av cutter carrying element disposed parallelto the face, a movable cutter chain on the Working face thereof andmeans for operating said element to cut an entry of substantially thesame configuration as said element but larger than the latter. p

22. In a mining apparatus, an entry cutter carrying element disposedparallel to the face, a. movable cutter chain on the worklng facethereof and means for moving said element bodily vertically andtransversely during cutting.

In a mining apparatus, an entry cutter carrying element disposedparallel to the face,-a movable cutter chain on the Working face thereofand means for moving said element bodily vertically and transversely inopposite directions during cutting.

24. In a mining apparatus, a cutter supporting element disposed parallelto the face, an entry cutting chain thereon, and means utilizing thethrust of the latter for moving said element transversely.

25. In mining apparatus, a cutter supporting element disposed parallelto the face, an entry cutting chain thereon, andmeans utilizing thethrust of the latter for moving said element in a substantiallyelliptical path.

26. In a ininin apparatus, a cutter supp rting elementoisposed parallelto a face, a cutter chain movable thereomand rotating means for movingsaid element transversely in an opposite direction to said chain.

27. In amining apparatus, a substantially elliptical cutter carryingelement disposed parallel to the face, cutters thereon including amovable cutter chain and means for simultaneously actuating the cuttersthereon and moving said element transversely of the face.

28.- In a mining apparatus, a substantially elliptical cutter carryingelement disposed substantially fiat against the face, cutters thereonincluding a movable cutter chain thereon and means for simultaneouslymoving said element transversely and feeding it toward the face. 7 V p29. In a mining apparatus, a substantially vertically disposed cuttercarrying element, a cutter chain movable thereon, crank mechanismoperatively connected with the opposite ends thereof, and means forfeeding said mechanism toward the Work. I

80. In a mining apparatus, a substantially vertically. disposed cuttercarrying element, crank mechanism operatively connected with theopposite ends thereof, and means for reversing the crank movement.

31. In a mining apparatus, a substantially vertically disposed cuttercarrying element, crank mechanism operatively connected vvith theopposite ends thereof, and automatically acting means for revesing thecrank movement. 1 i

32. In a mining apparatus, a substantially vertically disposed cuttercarrying element, crank mechanism operatively connected With theopposite ends thereof, andadjustable automatically acting means forreversing the crank movement. 7 I V 33. In a mining apparatus, asubstantially vertically disposed cutter carrying element, crankmechanism operatively connected with the opposite ends thereof, andmeans for se lectively rota-ting or oscillating said. crank;

porting element, a cutter chain thereon, and

crank mechanism operatively connected by said chain for moving saidelement transcarried on said evener.

'" connecting said cranks.

versely during cuttin S'ZQIn a mining apparatus, a cutter carryingsection, an anchoring section, feedscrews thereon, an evener pivotallymounted on said second section, and feed screw nuts 38. "In a miningapparatus, a cutter carrymg section, anoperatively connected anchormgsection, and a substantially semielliptical transverse skiddisposedunder and at the sides of each of said sections.

39. In a mining apparatus, a frame, a cutfter bar disposed transverselythereof, a cutter chain thereon, cranksoperatively connected to the endsof said bar, motor, and op' 'eratlve' connections thereto for rotatingsaid cranks and cutter chain. 40. Ina mining apparatus, a frame, acutter bar thereon, cranks operatively connected to the ends thereof, amotor, and operative I to the ends thereof, a cutter chain operativelyconnecting said cranks, and means for rotating said' cranks andchain inopposite directions. Y

43.1w mining apparatus, a frame, a cutter bar thereon, cranksoperatively connected to the ends thereof, afcutter chain operativelyconnecting said cranks,and means for rotating said cranks and chain inopposite directions at different speeds.

44. In a mining apparatus, a cutter carrying element, cranks operativelyconnected to the opposite ends thereof, a cutter chain operativelyconnecting said cranks, and means for oscillating said cranks whilecontinuously rotating said chain. 7

45. In a mining apparatus, a cutter carrying element, cranks operativelyconnected to the opposite ends thereof, a cutter chain operativelyconnecting said cranks, means for oscillating said cranks through pathsof variable amplitude while continuously rotating said chain and.feeding the latter to'ward'the work.

46. In a miningapparatus, a plurality of driving mechanism, andoperative connections therewith for moving said element through asubstantially elliptical path and simultaneously moving said elementtoward the face.

48. Ina mining apparatus, an upright cutter bar disposed flatwise to aparallel face, a cutter chaiuthereon, driving mechanism,

and operative connections therewith for operating said cutter chain atone speed and for feeding said bar forward at another speed.

49. In a mining apparatus, a cutter bar disposed parallel to the face, acutter chain thereon, driving mechanism, and operative connectionstherewith for moving said bar slowly through a substantially ellipticalpath, operating said cutter chain, and moving said bar forward. 7 f

50. In a mining apparatus, a cutter carrying section, an anchoringsection, a .cutter bar on said carryingsection, a cutter cham on saidbar, feeding mechanism between said sections, driving mechanism on saidcutter carrying section, and means operatively connectable therewithformoving said bar through a substantially elliptical path in a planeparallel to the face, operating said cutter chain, moving said barforward, and movingsald sectlon's one relative to the other. V

51. In a mining apparatus, a single plane cutter carrying. elementhaving cutters movable about its outer edge, said element being disposedsubstantially parallel to a plane face, and means operatively connectedto said element for orbitally moving the same to cut out a substantiallylarger oblong open mg.

52. In a'mining apparatus, a single laterallyv elongated plane cuttercarrying ele ment having cutters movable about its outer edge, saidelement being disposed substantially parallel to a plane face, and meansoperatively connected to said element for orbitally moving ,the sametransversely ii its plane. 7

In testimony whereof I affix my signature.

MORRIS P. HOLMES.

@ERTIFIGATE 0i CORRECTIQN Patent Ne. 1,645,903. Granted @cteber ii,192?, t0

MGRRIS P. HQLNES.

it is hereby certified that errer appears in the printed specificationof the above nniniiereti patent requiring esrreetien as feiiews: Page i,iine 89, claim 6, after the went "element" insert the words "disposedsubstantiaiiy parallel to the face"; same page, iine 127, claim 13,aiter the were "eientent" insert a comma; page 5, line 19, claim 17,after the Wet-1i "tiiereen" insert a. comma; same page, lines 45, 52 and58, claims 21, 22 and 23, after the ward "thereei" and in iine 79, eiaim27, after tire weird "eitain" and line 86, eiaim 28, aiter the word"thereon" insert a comma; page 5, iines 38 ts 4i, strike out the Words"tile same is cut an entry at substantially the same eeniigaratientransverseiy as said cutter carrying element" and insert instead "saidelement to cut an entry sf substantiaiiy the same configurationtransversely as said cutter carrying eiernent"; and that the saidLetters Patent siteu id be read with tiaese eerreetiens therein that thesame may conform te the record oi the case in the Patent ()ifice.

Signed anti seaied this 20th day of December, A. D. 1927.

M. J. Meere,

Seal. Aeting Qemnaissiener of Patents.

